【題目】—Linda found a notebook in the hallway.

—Oh, it ________ be Bob’s. Bob lost his notebook.

A.canB.mustC.can’tD.mustn’t

【答案】B

【解析】

句意:——琳達(dá)在走廊里找到一本筆記本!,那一定是鮑勃的。鮑勃把筆記本丟了。

A. can表示猜測(cè)時(shí),經(jīng)常用于疑問(wèn)句或者否定句;B. must表示猜測(cè)時(shí),為有把握的肯定猜測(cè);C. can’t表否定猜測(cè),不可能;D. mustn’t一定不要,表示禁止。根據(jù)Bob lost his notebook.可知此處表示肯定猜測(cè),故選B。

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